92 CALIFORNIA ACADEMY OF SCIENCES. 



flora, of which species it has the pubescence and viscosity. 

 The evenly rounded sides of the very plump akene are a 

 peculiarity rather in conflict with the accepted generic 

 character of Madia. There is discoverable, however, the 

 very obtuse suggestion merely of an angle on the ventral 

 face. 



LAYIA. 

 L. graveolens. 



Two feet high, stout and much branched, short-hirsute 

 and glandular : leaves all entire: heads large: rays cream- 

 color: clavate akenes slender; pappus deciduous in a ring, 

 bright white, the villous wool all straight and erect, two 

 thirds as long as the 18 — -20 slender bristles. 



Tehachapi Station, Kern County, California, June, 1884, 

 Mrs. Curran. The species is nearest L. heterotricha, though 

 a much larger plant with very heavy scented herbage, more 

 clavate and less villous akenes, and a deciduous pappus, of 

 which the wool is more copious and much longer. 



TETRADYMIA. 

 T. stenolepis. 



Near T. catiescens, but the branches bearing, for the most 

 part, long, straight, divergent spines in place of leaves: 

 shrub two feet high, much branched, and white throughout 

 with dense, close tomentum : leaves mostly on the flowering 

 branchlets, spatulate-lauceolate, an inch or more long, with 

 sharp spinose tips; no fascicled ones: head f inch high, 

 5-flowered; involucral scales 5, linear, obtuse: akenes barely 

 pubescent on the nerves; pappus copious. 



Mountains of Kern Co. , California. Mrs. Curran, 1884. 

 An interesting bush, intermediate between T. canescens and 

 T. spinosa, and therefore destructive of the sectional divis- 

 ions of the genus, as made in the Synoptical Flora. 



